TITLE

Three dimensional character of whistler turbulence

AUTHOR(S)
Ganguli, Gurudas; Rudakov, Leonid; Scales, Wayne; Wang, Joseph; Mithaiwala, Manish
PUB. DATE
May 2010
SOURCE
Physics of Plasmas;May2010, Vol. 17 Issue 5, p052310
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
It is shown that the dominant nonlinear effect makes the evolution of whistler turbulence essentially three dimensional in character. Induced nonlinear scattering due to slow density perturbation resulting from ponderomotive force triggers energy flux toward lower frequency. Anisotropic wave vector spectrum is generated by large angle scatterings from thermal plasma particles, in which the wave propagation angle is substantially altered but the frequency spectrum changes a little. As a consequence, the wave vector spectrum does not indicate the trajectory of the energy flux. There can be conversion of quasielectrostatic waves into electromagnetic waves with large group velocity, enabling convection of energy away from the region. We use a two-dimensional electromagnetic particle-in-cell model with the ambient magnetic field out of the simulation plane to generate the essential three-dimensional nonlinear effects.
ACCESSION #
51059789

 

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